The seventh planet in the solar system â and the smallest of the gas giants â Uranus has an atmosphere more comparable with Neptune than with Saturn and Jupiter. Known as ice giants, the two most distant planets from the sun have atmospheres that are heavily dominated by ices.
PDCA (plan-do-check-act, sometimes seen as plan-do-check-adjust) is a repetitive four-stage model for continuous improvement in business process management. The PDCA model is also known as the Deming circle/cycle/wheel, Shewhart cycle, control circle/cycle, or planâdoâstudyâact (PDSA).
These efforts can seek âincrementalâ improvement over time or âbreakthroughâ improvement all at once. Among the most widely used tools for continuous improvement is a four-step quality modelâthe plan-do-check-act (PDCA) cycle, also known as Deming Cycle or Shewhart Cycle: 1  Plan: Identify an opportunity and plan for change.